Patents by Inventor Ulrich Bierbach

Ulrich Bierbach has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11591357
    Abstract: The present invention relates to payloads containing functionalized platinum-(benz)acridine hybrid agents as cytotoxic warheads and a method of synthesizing the payloads. The payload can be regioselectively conjugated to a biologically active moiety in order to facilitate the delivery and/or enhance the activity of the platinum compound.
    Type: Grant
    Filed: August 28, 2018
    Date of Patent: February 28, 2023
    Assignee: Wake Forest University
    Inventors: Ulrich Bierbach, Xiyuan Yao, Hanwen Wang
  • Publication number: 20210330679
    Abstract: Platinum-acridines and analogs thereof as cytotoxic agents for cancer treatment. Also provided methods of using hMATE1 (SLC47A1) as a biomarker to identify tumors that are likely to respond to the agents, and epigenetically sensitizing tumor tissue to anticancer drugs targeting this membrane transporter.
    Type: Application
    Filed: April 20, 2021
    Publication date: October 28, 2021
    Applicant: Wake Forest University
    Inventors: Ulrich Bierbach, Shenjie Zhang, Xiyuan Yao, Ikeer Y. Mancera-Ortiz, Noah H. Watkins
  • Patent number: 10925831
    Abstract: This invention relates to use of a platinum-acridine liposomal formulation and uses thereof in treating cancer in a subject.
    Type: Grant
    Filed: August 28, 2018
    Date of Patent: February 23, 2021
    Assignee: Wake Forest University
    Inventors: Ulrich Bierbach, Song Ding, Christopher L. Hackett
  • Publication number: 20200181185
    Abstract: The present invention relates to payloads containing functionalized platinum-(benz)acridine hybrid agents as cytotoxic warheads and a method of synthesizing the payloads. The payload can be regioselectively conjugated to a biologically active moiety in order to facilitate the delivery and/or enhance the activity of the platinum compound.
    Type: Application
    Filed: August 28, 2018
    Publication date: June 11, 2020
    Inventors: Ulrich Bierbach, Xiyuan Yao, Hanwen Wang
  • Publication number: 20190290685
    Abstract: Large-pore mesoporous silica nanoparticles (MSN) were prepared and functionalized to serve as a robust and biocompatible delivery platform for platinum-acridine (PA) anticancer agents. The material showed a high loading capacity for the dicationic, hydrophilic hybrid agent [PtCl(en)(N-[acridin-9-ylaminoethyl]-N-methylropionamidine)] dinitrate salt (P1 Al) and virtually complete retention of payload at neutral pH in a high-chloride buffer. In acidic media mimicking the pH inside the cells' lysosomes, rapid, burst-like release of P1 A1 from the nanoparticles is observed. Coating of the materials in phospholipid bilayers resulted in nanoparticles with greatly improved colloidal stability. The lipid and carboxylate- modified nanoparticles containing 40 wt. % drug caused S phase arrest and inhibited cell proliferation in pancreatic cancer cells at submicromolar concentrations similar to carrier-free P1A1.
    Type: Application
    Filed: October 27, 2017
    Publication date: September 26, 2019
    Inventors: Ulrich Bierbach, Ye Zheng, Ravi Singh
  • Patent number: 10377784
    Abstract: The present invention relates to the compounds of formula (I), pharmaceutically acceptable salts, and solvates thereof, wherein the various substituents are as defined herein. The compounds, solvates and salts thereof of Formula (I) are effective as anti-cancer compounds.
    Type: Grant
    Filed: July 12, 2018
    Date of Patent: August 13, 2019
    Assignee: WAKE FOREST UNIVERSITY
    Inventors: Ulrich Bierbach, Amanda J. Pickard
  • Publication number: 20190060234
    Abstract: This invention relates to use of a platinum-acridine liposomal formulation and uses thereof in treating cancer in a subject.
    Type: Application
    Filed: August 28, 2018
    Publication date: February 28, 2019
    Applicant: Wake Forest University
    Inventors: Ulrich Bierbach, Song Ding, Christopher L. Hackett
  • Publication number: 20180319832
    Abstract: The present invention relates to the compounds of formula (I), pharmaceutically acceptable salts, and solvates thereof, wherein the various substituents are as defined herein. The compounds, solvates and salts thereof of Formula (I) are effective as anti-cancer compounds.
    Type: Application
    Filed: July 12, 2018
    Publication date: November 8, 2018
    Applicant: Wake Forest University
    Inventors: Ulrich Bierbach, Amanda J. Pickard
  • Patent number: 10047057
    Abstract: Newly synthesized thiourea-modified 3-chloro-4-fluoroanilino-quinazoline derivatives have been studied as terminal carrier ligands in linear gold(I) complexes. The molecules mimic the tyrosine kinase inhibitor gefitinib (by computational docking experiments). Thiourea groups were either directly attached to quinazoline-C6 or linked to this position via a flexible ethylamino chain. One compound tested acts as a thiourea-S/quinazoline-N1 mixed-donor ligand, giving an unusual dinuclear complex as determined by X-ray crystallography and/or electrospray mass spectrometry. One compound formed the desired stable linear complex. The biological activity of the carrier ligands and corresponding gold(I) complexes was studied in NCI-H460 and NCI-H1975 lung cancer cells. One compound that was tested partially overcomes resistance to gefitinib in NCI-H1975 (with IC50 values of 1.7 and 30 ?M, respectively), and the corresponding gold complex (13) maintains activity in the low-micromolar concentration range.
    Type: Grant
    Filed: March 15, 2015
    Date of Patent: August 14, 2018
    Assignee: Wake Forest University
    Inventors: Ulrich Bierbach, Mu Yang, Amanda J Pickard
  • Patent number: 10023599
    Abstract: The present invention relates to the compounds of formula I, pharmaceutically acceptable salts, and solvates thereof: wherein the various substituents are as defined herein. The compounds, solvates and salts thereof of Formula I are effective as anti-cancer compounds.
    Type: Grant
    Filed: March 15, 2015
    Date of Patent: July 17, 2018
    Assignee: Wake Forest University
    Inventors: Ulrich Bierbach, Amanda J Pickard
  • Patent number: 9765103
    Abstract: The present invention relates to using a versatile synthetic approach to generate a new class of ester, amido, or carbamate prodrugs of highly potent, but systemically too toxic, platinum-acridine anticancer agents. The new hybrids contain a hydroxyl group, which has been masked with a cleavable lipophilic acyl moiety. Both butanoic (butyric) and bulkier 2-propanepentanoic (valproic) esters were introduced to these compounds. The goal of this design was to improve the drug-like properties of the pharmacophore (e. g., log D) without compromising its DNA-mediated cell kill potential. Two distinct pathways by which the target compounds undergo effective ester hydrolysis, the proposed activating step, have been confirmed: platinum-mediated, self-immolative ester cleavage in a low-chloride environment (LC-ESMS, NMR spectroscopy) and enzymatic cleavage by human carboxylesterase-2 (hCES-2) (LC-ESMS).
    Type: Grant
    Filed: June 22, 2015
    Date of Patent: September 19, 2017
    Inventors: Ulrich Bierbach, Song Ding
  • Publication number: 20170210772
    Abstract: The present invention relates to using a versatile synthetic approach to generate a new class of ester, amido, or carbamate prodrugs of highly potent, but systemically too toxic, platinum-acridine anticancer agents. The new hybrids contain a hydroxyl group, which has been masked with a cleavable lipophilic acyl moiety. Both butanoic (butyric) and bulkier 2-propanepentanoic (valproic) esters were introduced to these compounds. The goal of this design was to improve the drug-like properties of the pharmacophore (e.g., log D) without compromising its DNA-mediated cell kill potential. Two distinct pathways by which the target compounds undergo effective ester hydrolysis, the proposed activating step, have been confirmed: platinum-mediated, self-immolative ester cleavage in a low-chloride environment (LC-ESMS, NMR spectroscopy) and enzymatic cleavage by human carboxylesterase-2 (hCES-2) (LC-ESMS).
    Type: Application
    Filed: June 22, 2015
    Publication date: July 27, 2017
    Inventors: Ulrich Bierbach, Song Ding
  • Publication number: 20170081293
    Abstract: Newly synthesized thiourea-modified 3-chloro-4-fluoroanilino-quinazoline derivatives have been studied as terminal carrier ligands in linear gold(I) complexes. The molecules mimic the tyrosine kinase inhibitor gefitinib (by computational docking experiments). Thiourea groups were either directly attached to quinazoline-C6 or linked to this position via a flexible ethylamino chain. One compound tested acts as a thiourea-S/quinazoline-N1 mixed-donor ligand, giving an unusual dinuclear complex as determined by X-ray crystallography and/or electrospray mass spectrometry. One compound formed the desired stable linear complex. The biological activity of the carrier ligands and corresponding gold(I) complexes was studied in NCI-H460 and NCI-H1975 lung cancer cells. One compound that was tested partially overcomes resistance to gefitinib in NCI-H1975 (with IC50 values of 1.7 and 30 ?M, respectively), and the corresponding gold complex (13) maintains activity in the low-micromolar concentration range.
    Type: Application
    Filed: March 15, 2015
    Publication date: March 23, 2017
    Inventors: Ulrich Bierbach, Mu Yang, Amanda J Pickard
  • Publication number: 20170081351
    Abstract: The present invention relates to the compounds of formula I, pharmaceutically acceptable salts, and solvates thereof: wherein the various substituents are as defined herein. The compounds, solvates and salts thereof of Formula I are effective as anti-cancer compounds.
    Type: Application
    Filed: March 15, 2015
    Publication date: March 23, 2017
    Inventors: Ulrich Bierbach, Amanda J Pickard
  • Patent number: 9090640
    Abstract: Acridine containing cisplatin compounds have been disclosed that show greater efficacy against cancer than other cisplatin compounds. Methods of delivery of those more effective cisplatin compounds to the nucleus in cancer cells is disclosed using one or more amino acids, one or more sugars, one or more polymeric ethers, C1-6alkylene-phenyl-NH—C(O)—R15, folic acid, ?v?3 integrin RGD binding peptide, tamoxifen, endoxifen, epidermal growth factor receptor, antibody conjugates, kinase inhibitors, diazoles, triazoles, oxazoles, erlotinib, and/or mixtures thereof; wherein R15 is a peptide.
    Type: Grant
    Filed: August 30, 2012
    Date of Patent: July 28, 2015
    Inventors: Ulrich Bierbach, Song Ding
  • Patent number: 8906896
    Abstract: Acridine containing cisplatin compounds are disclosed that show greater efficacy than other cisplatin compounds for treating cancer. The compounds are compounds of Formula I wherein the variables are defined herein.
    Type: Grant
    Filed: October 23, 2009
    Date of Patent: December 9, 2014
    Inventor: Ulrich Bierbach
  • Publication number: 20140193334
    Abstract: Acridine containing cisplatin compounds have been disclosed that show greater efficacy against cancer than other cisplatin compounds. Methods of delivery of those more effective cisplatin compounds to the nucleus in cancer cells is disclosed using one or more amino acids, one or more sugars, one or more polymeric ethers, C1-6alkylene-phenyl-NH—C(O)—R15, folic acid, ?v?3 integrin RGD binding peptide, tamoxifen, endoxifen, epidermal growth factor receptor, antibody conjugates, kinase inhibitors, diazoles, triazoles, oxazoles, erlotinib, and/or mixtures thereof; wherein R15 is a peptide.
    Type: Application
    Filed: August 30, 2012
    Publication date: July 10, 2014
    Inventors: Ulrich Bierbach, Song Ding
  • Patent number: 6113934
    Abstract: The present invention relates to treatment of viral infections, such as HIV, with a new class of anti-viral platinum coordination compounds having the general structural formula [PtXA.sub.m B.sub.3-m ] where X is an anionic ligand, A is an acyclic, nitrogen containing monodentate ligand such as amines, ammines, and quinolines, and B is nucleobase.
    Type: Grant
    Filed: June 11, 1998
    Date of Patent: September 5, 2000
    Assignee: Virginia Commonwealth University
    Inventors: Nicholas Farrell, Ulrich Bierbach
  • Patent number: 6001872
    Abstract: The present invention relates to the treatment of tumors with a novel water soluble trans-platinum coordination compound having the general structural formula [PtBX.sub.m (NR*.sub.3)] where B is a planar, heterocyclic ring containing at least one nitrogen atom, and a pendant chelating group; and X is an anionic ligand; and R* is hydrogen or a lower alkyl.
    Type: Grant
    Filed: March 5, 1999
    Date of Patent: December 14, 1999
    Assignee: Virginia Commonwealth University
    Inventors: Nicholas P. Farrell, Ulrich Bierbach